<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>按钮</title>
</head>
<body>
    <!-- form表单区域 -->
    <form action="">
        用户名<input type="text">
        <br><br>
        密码<input type="password">
        <br><br>
        <button type="submit">提交</button>
        <button type="reset">重置</button>
        <button type="button">普通按钮</button>
    </form>

</body>
</html>